ura·​ni·​nite | \ yu̇-ˈrā-nə-ˌnīt How to pronounce uraninite (audio) \

Definition of uraninite

: a black octahedral mineral that consists of an oxide of uranium which usually contains thorium, lead, and rare earth elements and is the chief ore of uranium

First Known Use of uraninite

1879, in the meaning defined above

History and Etymology for uraninite

German Uranin uraninite (from New Latin uranium) + English -ite

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The first known use of uraninite was in 1879

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Cite this Entry

“Uraninite.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/uraninite. Accessed 14 December 2019.

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ura·​ni·​nite | \ yu̇-ˈrā-nə-ˌnīt How to pronounce uraninite (audio) \

Medical Definition of uraninite

: a mineral that is basically a black octahedral or cubic oxide of uranium containing lead, thorium, and rare earth elements and that is the chief ore of uranium

More from Merriam-Webster on uraninite

Britannica.com: Encyclopedia article about uraninite

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